Ventilating-fan.



PATENTED APR. `16, 1907.

L. L. HOLLADAY.

' VENTILATING FAN.

APPLIOATION FILED AUG.14. 190s.

Winesses,

Inventor.

Lewis L.. Holladay by f ' may ssii-TED STATES PATENT, oi'iiion.

Lewis i.. uoisgADAr, or LYNN, nAssAenUsnrrs, AssreNoR' To GENERAL lClj'rClRIC COMPANY, A CORPORATION vOF NEW YORK.v

VENTI'LATINGFFAN.

Specification of Letters Patent.

rati-mesa April 16. i907.

Application filed August 14,1903. Serial No. 169.485.

Beitknown that I, LEWIS L. HOLLADAY, a

, citizen oi the United States, residing at Lynn,

in the county of Essex, State of Uassachw vsetts, have invented certain new and use'l`u1` lmpro vements in Ventilating-Fans, of which the -following is a specification.

The present invention relates to rotaryA Ventilating-fans, and more particularly `to' that class in whichprovision'is made for ai1- thereof.

My invention' contemplates theuse, with a rotary ventilatingfan of any well-known construction and suitably supported upon a pivotal axis, of a screen adapted .to diminish the volume of air delivered to the blast-iinpellingmember at jone side of the pivotal axis, stops suitably arranged for engaging the screen and retaining it momentarily in either of its operative positions, and means having a spring connection with the screen and actuated by a rotary part of the fan for putting the spring under 'tension and intermittently releasing the screen from the stops, so that it moves with a quick action to itsopposite position.

For a better understanding of my invention reference may be had to the following description and the accompanying drawings, forming a part of this speciiication, in which. f*

vFigure l is a side elevation. oi'` a rotary'ven tilatiiig-l'an pivotally supi'iorted and provided with means for init-ematica]ly oscillating it embodying one lorm ol my invention,

aiiil Fig. 2 is i` .right-'hand elevation` ol the automatic oscillating means. A

A, is the lrame ol an electric motor, having Vits arinature-shaft .B I-)rojeeting horizontaily therel'roiii and carrying at its end the blastiiiipelling blades C, and D 1s the pivoted base upon. which the ii'i, itor-'lramc 'is supported.

These parts may be of any well-'known construction and accordingly need not be described here in detail.

The screen is made from sheet material in the form of an eccentric plate or sector 1 and provided at its geometrical center with a hub 2 which is journaled upon the arniatureshaft B between the blades C and the 'frame A. The ,diameter of the sector is shown somewhat greater than the diameter of the Ablast-impellingmember C; but it is understood that in practice. these relative dimensions'will be changed according to the requirements of circumstances.

The means ior momentarily holding`tl1e sector 1 in either 'operative position, as

shownvv in Fig. 2, or the reverse consists of a lug 3, projecting from the edge oi the sector, and two stops `4, `arranged at diametrically opposite points in the path of the lug 3 and carried by a reci )rocating'red 5, which is pe# riodically raise er lowered su'liiciently to move one of the stops 4 out of engagement with the lug 3 and bring' the other into posi tion tobe engaged thereby upon the completion of a semireyolution of the sector. The

Vrod 5 is provided with an elongated apertureA 6 in a central enlargement;'through whichthe arn'iature-shaft B passes,and 1t is held 1n vertical position between a collar 7 and th end of the'hub 2 on the shaft land a bracket 8, extending from the base D and provided at its end with aslot through which the rod passes, and a springclip 9, which operates t produce friction thereon to yieldably hold the rod in either of 'its extreme positions.

The means for giving the sector l a quick movement from one operative position to the other consists of a spiral spring 10, attached at one end to a pin l2, carried by the sector,

and at the other end toa short shaft 13, which has a constant planetary movement about-thc armature-shaft, so that while the sector is held by one of the stops 4 the sprii'ig is tensioned, and then upon release of the sector the recoil ofthe spring operates to draw the sector into its opposite position, where it is engaged by the other'stop 4. The means for moving the stops 4 out of the path oi' the IOO lug 3 to release the sector consists of two inclines'll, carried by the rod 5, which are alternately brought into the circular path of' the front end of the short'shaft 13, so that the rod will be moved endwise thereby." at the completion of eachsemicircularmovement of the shai't'13 about'the axis of the armature.

The short shaft 13 iscarried at the end of an arm 15, journaled upon the y armatureshaft B, and is given a slow movement thereabout by Ia s stem of reducing-gears arranged as folloWs pinion 16sis` fixed td the armature-shaft between the end of hub 2 and the Y arm 15 and meshes with a large gear 17, fixed to the shaft 13-at the front of the arm 15. A second pinion 18 is fixed to the rear end of .the shaft 13 and meshes with an idler-gear 19, which is journaled upon a stub-shaft 20, projecting from the side of the arm 15, and gear 19 meshes with and travels about `a station- `Iary gear 21, concentric With the armatureshaft and located between the arm 15 and the frontv end of the motor-frame A.

I do not intend to` restrict myself to the particular form or construction ofy parts shown and described herein, for it is apparent that they may be changed and modified Without departing from my invention.

`VVhat I claim as new, and desire to secure by Letters Patent of the United States, is-

1. The combination with a pivotally-supported Ventilating-fan, of an eccentricallyivoted screen supported in proximity to the' llast-impelling member of the fan, means for intermittently holding said screen iiioperative positions on opposite sides of the pivotal Aaxis of the fan and releasing it therefrom,

and spring-controlled means for shifting said screen from one position to the other.

3. The combination with a pivotally-supported Ventilating-fan, of an eccentricallypivoted screen pivotally supported in proximity to the vblast-impelling member of the fan, means for intermittently holding said screen in operative positions on opposite sides of the pivotal axis of the fan and releasing it therefrom, and 'spring-controlled means for shifting said screen from one position to the other.

4. The combination with a pivotally-supported Ventilating-fan, of an eccentricallypivoted 'screen pivotally supported in proximity to the blast-impelling member of the fan, stops for holding said fan in operative positlons on opposite sides of the pivotal axis v*of the fan, means for putting spring tension on said screen, and means lor intermittently releasing the screen from said stops.

5. The combination with a pivotally-supported ventilating-fan, of an eccentricallypivoted screen pivotally supported in proximity to the blast-impelling` member of the fan, a continuously-revoluble part having spring connection with said screen, means for holding the screen in either 'of its operative positions on opposite sides of the pivotal axis of the fan, and means for periodically releasi'ng said screen from said holding means.

6. The combination with a pivotally-supported Ventilating-fan, of an eccentrica-Hypivoted screen -pivotally supported in proximityto the blast-impelling member of the fan, a reciprocating rod provided with stops adapt vd to engage a part of said screen and hold it in operative position With reference to the pivotal axis of the fan, and a continuously-revoluble part having spring connectionwith said screen and adapted to periodicall'yengage and reci rocate said rod to release said-screen there om.

In witness whereof I have hereunto set my hand this'12th day of August, 1908.

. Y LEWIS L. HOLLADAY. Witnesses DUGALD MoK. i McKILLoP, JOHN J. WALxER. 

